Users of Microsoft Office can now choose one of the Creative Commons licenses for work created in Microsoft Word, Excel and PowerPoint. Microsoft and Creative Commons, a nonprofit organization that offers flexible copyright licenses for creative works, partnered with 3sharp LLC to develop and test this new copyright licensing tool, known as the Creative Commons add-in for Microsoft Office.

As a matter of fact the CC is probably not legally compatable with non-standard filesystems I would have to think. If not they should put that clause in incase they haven't noticed. Maybe CC hasn't understood DRM properly. Great that people can share files but if they can't open the dam things up.

You're confusing a license with a standard.
CC lets you license anything you create, including closed and proprietry formats like JPEGs, MPGs and so on. Enforcing open standards is outside the scope of the Creative Commons.